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Priority to BE673971ApriorityCriticalpatent/BE673971A/fr
Priority to ES0324585Aprioritypatent/ES324585A1/es
Publication of BE673971ApublicationCriticalpatent/BE673971A/fr
Dispositif pour realiser au choix dans une bande de materiau en mouvement continu des echancrures ou des trous ou des trous d'aiguille servant a la purge de l'air